Answer
$x^2+y^2=9$
Work Step by Step
Given the center and radius of a circle as $C(0,0), r=3$, using the standard form of a circle, we can write the equation as $(x-0)^2+(y-0)^2=(3)^2$ or $x^2+y^2=9$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 1 - Review Exercises - Page 304: 122
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